1) oxygen: oxygen in rubber and rubber molecules occur free radical chain reaction, molecular chain rupture or excessive crosslinking, causing changes in the properties of rubber. Oxidation is one of the important reasons for the aging of rubber.

2) the chemical activity of ozone and ozone is much higher than that of oxygen, which is more destructive. It also makes the molecular chain rupture, but the effect of ozone on rubber is different with the deformation of rubber. As for the deformation of the rubber (mainly unsaturated rubber), and should force perpendicular to the direction of crack, the so-called "of" ozone cracking; role in the deformation of the rubber, only formed on the surface of the oxide film without cracking.

3) heat: increasing temperature can cause thermal cracking or thermal crosslinking of rubber. But the basic function of heat or activation. Increasing the oxygen diffusion rate and the activation oxidation reaction, which can accelerate the oxidation reaction rate of rubber, which is a common phenomenon of aging.

4) light: the shorter the light, the greater the energy. The damaging effect of the rubber is the high energy ultraviolet. In addition to the direct cause of the breaking and crosslinking of rubber molecular chain, rubber absorbs light energy and produces free radicals, which can lead to and accelerate the process of oxidation chain reaction. Ultraviolet light plays the role of heating. Another characteristic of light (and heat) is that it is mainly on the surface of the oak. With high adhesive rate of the sample, both sides will be a net crack, which is called "light outer crack".

5) mechanical stress: the conveyor belt in the mechanical stress and the continuous friction process, will make the rubber molecular chain break free radicals, and lead to oxidation chain reaction, forming force and chemical process. Mechanical fracture molecular chain and mechanical activation oxidation process. Which can dominate, depending on the conditions at which they are located. In addition, under stress due to ozone cracking.

6) moisture: moisture has two aspects: rubber in the damp air, rain or soaked in water, easy to destroy. This is due to the rubber water soluble substances and water groups components are dissolved in water extraction. Hydrolysis or absorption and other causes of. Especially in the effect of alternative water immersion and atmospheric exposure, will accelerate the destruction of rubber. However, in some cases, the moisture of rubber will not damage, and even the role of delaying aging.

7) other factors: the rubber and chemical medium, valence metal ion, high-energy radiation, electrical and biological etc..